Join Microsoft AI, the team behind Copilot, Bing, MSN, Microsoft Advertising, and Edge, as we build the next generation of intelligent mobile experiences. We're looking for a Software Engineer with deep expertise in iOS development to support our mobile foundations. In this role, you will architect, harden, and optimize the core layers of our mobile applications—frameworks, infrastructure, performance pipelines, and reliability systems—that power Copilot and our broader ecosystem across millions of devices.
\nThis position is ideal for someone who thrives at the intersection of platform engineering, system design, performance optimization, and long-term architectural thinking. You will shape the technical backbone that enables product teams to move faster, ship safer, and innovate with confidence. If you enjoy building durable foundations, eliminating systemic risks, and raising the quality bar for mobile engineering, you’ll feel right at home on our team.
\nMAI operates with the agility of a startup—fast-paced, iterative, and impact-driven—while backed by Microsoft’s mission to empower every person and organization on the planet to achieve more. We value engineers who take initiative, navigate ambiguity with clarity, and continuously push the boundaries of what mobile platforms can achieve.
\nResponsibilities
\nStrengthen the core quality and reliability of the app, building guardrails, diagnostics, and automated protections that prevent regressions and ensure consistent performance at scale.
\nDrive optimizations across the app, using deep platform knowledge to identify systemic bottlenecks and implement durable improvements.
\nPartner closely with cross-functional teams (Product, Design, Research, Backend, AI) to translate complex requirements into robust, scalable client-side solutions.
\nExplore and integrate AI-assisted development workflows to improve code quality, reduce iteration time, and enhance developer productivity across the mobile organization.
\nOwn critical incident response and long-term remediation, ensuring the app remains stable, observable, and resilient under real-world conditions.
\nQualifications
\nRequired Qualifications:
\nBachelor’s Degree in Computer Science or related technical field AND 2+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
\n2+ years of professional experience in iOS development using Swift and/or Objective‑C, with strong understanding of iOS frameworks, system behaviors, and performance characteristics.
\nProven experience building and maintaining large-scale, high-quality mobile applications with complex architecture and long-term maintainability requirements.
\nSolid understanding of mobile system design, including modularization, dependency management, concurrency, memory management, and networking.
\nDemonstrated ability to diagnose and resolve deep technical issues across performance, stability, and reliability dimensions.
\nA growth mindset and willingness to adopt new tools, technologies, and AI-assisted engineering workflows.
\nPreferred Qualifications:
\nMaster’s Degree in Computer Science or related technical field AND 3+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor’s Degree in Computer Science or related technical field AND 5+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
\nExperience designing mobile foundations or platform-level components (e.g., shared frameworks, internal SDKs, architecture patterns).
\nExpertise in performance profiling, crash/ANR root-cause analysis, startup optimization, memory tuning.
\nExperience with cross-platform client engineering (Android, React Native, Flutter, or shared C++ layers) is a plus.
\nSolid communication and collaboration skills, with the ability to influence engineering direction across multiple teams.
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\nIn this role, you will architect, harden, and optimize the core layers of our mobile applications—frameworks, infrastructure, performance pipelines, and reliability systems—that power Copilot and our broader ecosystem across millions of devices.
\nThis position is ideal for someone who thrives at the intersection of platform engineering, system design, performance optimization, and long-term architectural thinking. You will shape the technical backbone that enables product teams to move faster, ship safer, and innovate with confidence.
\nIf you enjoy building durable foundations, eliminating systemic risks, and raising the quality bar for mobile engineering, you'll feel right at home on our team.
\nMAI operates with the agility of a startup—fast-paced, iterative, and impact-driven—while backed by Microsoft’s mission to empower every person and organization on the planet to achieve more.
\nWe value engineers who take initiative, navigate ambiguity with clarity, and continuously push the boundaries of what mobile platforms can achieve.
\nResponsibilities:
\nStrengthen the core quality and reliability of the app, building guardrails, diagnostics, and automated protections that prevent regressions and ensure consistent performance at scale.
\nDrive optimizations across the app, using deep platform knowledge to identify systemic bottlenecks and implement durable improvements.
\nPartner closely with cross-functional teams (Product, Design, Research, Backend, AI) to translate complex requirements into robust, scalable client-side solutions.
\nExplore and integrate AI-assisted development workflows to improve code quality, reduce iteration time, and enhance developer productivity across the mobile organization.
\nOwn critical incident response and long-term remediation, ensuring the app remains stable, observable, and resilient under real-world conditions.
\nQualifications:
\nBachelor’s Degree in Computer Science or related technical field AND 2+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
\n2+ years of professional experience in iOS development using Swift and/or Objective‑C, with strong understanding of iOS frameworks, system behaviors, and performance characteristics.
\nProven experience building and maintaining large-scale, high-quality mobile applications with complex architecture and long-term maintainability requirements.
\nSolid understanding of mobile system design, including modularization, dependency management, concurrency, memory management, and networking.
\nDemonstrated ability to diagnose and resolve deep technical issues across performance, stability, and reliability dimensions.
\nA growth mindset and willingness to adopt new tools, technologies, and AI-assisted engineering workflows.
\nPreferred Qualifications:
\nMaster’s Degree in Computer Science or related technical field AND 3+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor’s Degree in Computer Science or related technical field AND 5+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
\nExperience designing mobile foundations or platform-level components (e.g., shared frameworks, internal SDKs, architecture patterns).
\nExpertise in performance profiling, crash/ANR root-cause analysis, startup optimization, memory tuning.
\nExperience with cross-platform client engineering (Android, React Native, Flutter, or shared C++ layers) is a plus.
\nSolid communication and collaboration skills, with the ability to influence engineering direction across multiple teams.
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\nAnthropic's mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build beneficial AI systems.
\nAbout the role:
\nWe're looking for seasoned iOS engineers to join our Claude mobile product team and help build apps that harness the transformative power of advanced language models. Our mission is to unlock the potential of advanced AI through elegant, user-friendly mobile applications that put unprecedented capabilities at users' fingertips. You will work with a talented team of engineers, researchers, design and Product teams to design and implement key components of our products. Join us in this exciting mission to transform how people engage with technology and unlock new realms of human potential.
\nResponsibilities:
\nYou might be a good fit if you have:
\nStrong candidates may have:
\nLogistics
\nEducation requirements:
\nWe require at least a Bachelor's degree in a related field or equivalent experience.
\nLocation-based hybrid policy:
\nCurrently, we expect all staff to be in one of our offices at least 25% of the time. However, some roles may require more time in our offices.
\nVisa sponsorship:
\nWe do sponsor visas! However, we aren't able to successfully sponsor visas for every role and every candidate. But if we make you an offer, we will make every reasonable effort to get you a visa, and we retain an immigration lawyer to help with this.
\nWe encourage you to apply even if you do not believe you meet every single qualification.
\nNot all strong candidates will meet every single qualification as listed. Research shows that people who identify as being from underrepresented groups are more prone to experiencing imposter syndrome and doubting the strength of their candidacy, so we urge you not to exclude yourself prematurely and to submit an application if you're interested in this work.
\nYour safety matters to us.
\nTo protect yourself from potential scams, remember that Anthropic recruiters only contact you from @anthropic.com email addresses. In some cases, we may partner with vetted recruiting agencies who will identify themselves as working on behalf of Anthropic. Be cautious of emails from other domains. Legitimate Anthropic recruiters will never ask for money, fees, or banking information before your first day. If you're ever unsure about a communication, don't click any links—visit anthropic.com/careers directly for confirmed position openings.
\nHow we're different
\nWe believe that the highest-impact AI research will be big science. At Anthropic we work as a single cohesive team on just a few large-scale research efforts. And we value impact — advancing our long-term goals of steerable, trustworthy AI — rather than work on smaller and more specific puzzles. We view AI research as an empirical science, which has as much in common with physics and biology as with traditional efforts in computer science. We're an extremely collaborative group, and we host frequent research discussions to ensure that we are pursuing the highest-impact work at any given time. As such, we greatly value communication skills.
\nThe easiest way to understand our research directions is to read our recent research. This research continues many of the directions our team worked on prior to Anthropic, including: GPT-3, Circuit-Based Interpretability, Multimodal Neurons, Scaling Laws, AI & Compute, Concrete Problems in AI Safety, and Learning from Human Preferences.
\nCome work with us!
\nAnthropic is a public benefit corporation headquartered in San Francisco. We offer competitive compensation and benefits, optional equity donation matching, generous vacation and parental leave, flexible working hours, and a lovely office space in which to collaborate with colleagues.
\nGuidance on Candidates' AI Usage:
\nLearn about our policy for using AI in our application process
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\nAbout the Team (Incubation)
\nThe Incubation team builds new product lines from zero to one — exploring bold ideas and turning the most promising ones into real, shipped experiences. We work at the intersection of design, engineering, and research to prototype quickly, learn from real users, and scale what works. Our goal is to unlock entirely new ways people can create, communicate, and get things done with OpenAI’s technology — with a high bar for quality, safety, and craft.
\nAbout the Role
\nWe’re looking for an engineer to lead the development of new iOS experiences inside our Incubation team. You’ll help invent and ship early-stage products that bring AI into people’s lives in ways that feel intuitive, human, and genuinely useful. This is a hands-on, high-ownership role: you’ll move fast from prototype to product, help shape product direction through iteration, and lay strong technical foundations as ideas mature into scalable systems.
\nWe’re looking for engineers who thrive in small, nimble teams, bring strong product instincts, and pair sharp judgment with excellent execution. You should be comfortable operating with ambiguity, running experiments, learning quickly from results, and translating those learnings into both product and architecture decisions.
\nIn this role, you will:
\nYou might thrive in this role if you:
\nAbout OpenAI
\nOpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity.
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